a description of a still unreleased fbi video. according to those familiar with what itshows,dzhokhartsarnaevcanbe seen removing his backpack at the spot where the second bomb was placed, and acting very differently from those around him when e first bomb blew up. >> this suspect took the backpack off, put it down, did not react when the first explosion went off, and then moved away from the backpack in time for the second explosion. >> federal officials say in the hours after the fbi released photos of the bombing suspects thursday night, investigators had not yet matched any names to their pictures and, in fact, did not even have the tsarnaev brothers in any terrorist data base. only after the older brother was killed in the late night shootout in watertown were agents able to check his fingerprints and put actual names to their case. fbi agents are seeking to interview all the family members and friends of the two brothers, including the wife of the older one, tamerlan. her lawyer says he is talking to federal authorities about how to proceed. matt? >> pete williams, thank you very much.

virning suspect will be answering questions. zoz has a neck wound--dzhokhartsarnaevhasa neck round that's keying him from speaking. we're hearing he's answering questions while writing, still under heavy guard at the hospital. no official charges have been filed yet but that will change today or the coming days. boston police believe both brothers had plans to kill others. >> both suspects were armed with guns at the scene of the shooting. >> there's also a question this morning on how the suspect should be questioned in the first place. some lawmakers say he should be contracted an em -- considered enemy combatant. >> the decision not to read miranda rights was made by the federal officials. this is a unique clause at the federal level that we've not experienced here. >> the mother of both suspects tells the "associated press" that the fbi spoke to her sons after the bomb exploded an continues to claim that the fbi monitored him back in 2011 during an interview. a moment of silence begins at 11:50 hour time. back to you. >> thank you. >>> students at the university of massachusett